GB1487955A - Timepieces having time standards constituted by piezo-electric crystal oscillators - Google Patents

Timepieces having time standards constituted by piezo-electric crystal oscillators

Info

Publication number
GB1487955A
GB1487955A GB52478/74A GB5247874A GB1487955A GB 1487955 A GB1487955 A GB 1487955A GB 52478/74 A GB52478/74 A GB 52478/74A GB 5247874 A GB5247874 A GB 5247874A GB 1487955 A GB1487955 A GB 1487955A
Authority
GB
United Kingdom
Prior art keywords
time
signal
reset
frequency
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB52478/74A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suwa Seikosha KK
Original Assignee
Suwa Seikosha KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suwa Seikosha KK filed Critical Suwa Seikosha KK
Publication of GB1487955A publication Critical patent/GB1487955A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • H03K23/662—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by adding or suppressing pulses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
GB52478/74A 1973-12-05 1974-12-04 Timepieces having time standards constituted by piezo-electric crystal oscillators Expired GB1487955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48135301A JPS587190B2 (ja) 1973-12-05 1973-12-05 スイシヨウドケイ

Publications (1)

Publication Number Publication Date
GB1487955A true GB1487955A (en) 1977-10-05

Family

ID=15148493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52478/74A Expired GB1487955A (en) 1973-12-05 1974-12-04 Timepieces having time standards constituted by piezo-electric crystal oscillators

Country Status (5)

Country Link
US (1) US4051663A (de)
JP (1) JPS587190B2 (de)
GB (1) GB1487955A (de)
HK (1) HK34980A (de)
MY (1) MY8100133A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315332A (en) * 1979-04-13 1982-02-09 Kabushiki Kaisha Daini Seikosha Electronic timepiece radio
US4580282A (en) * 1981-11-25 1986-04-01 Plessey Overseas Limited Adjustable ratio divider
EP0253227A1 (de) * 1986-07-10 1988-01-20 EM Microelectronic-Marin SA (EM Microelectronic-Marin AG) (EM Microelectronic-Marin Ltd) Vorrichtung zum Programmieren einer nichtflüchtigen Speichervorrichtung für ein Uhrwerk
EP0635771A1 (de) * 1993-01-08 1995-01-25 Citizen Watch Co. Ltd. Datenübertragungsempfangsystem für elektronische Uhr

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911878B2 (ja) * 1975-12-24 1984-03-19 シチズン時計株式会社 デジタル電子時計
US4188775A (en) * 1976-11-16 1980-02-19 Citizen Watch Company Limited Frequency adjustment means for electric timepiece
US4232512A (en) * 1976-12-27 1980-11-11 Citizen Watch Co., Ltd. Solid state watch module construction
CH618315GA3 (de) * 1977-02-21 1980-07-31
US4234958A (en) * 1977-06-16 1980-11-18 Lathem Time Recorder Co., Inc. Radio synchronized time-keeping apparatus and method
US4142360A (en) * 1977-07-07 1979-03-06 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
JPS5422865A (en) * 1977-07-21 1979-02-21 Seiko Epson Corp Miniature electronic watch
US4211065A (en) * 1977-08-26 1980-07-08 Hughes Aircraft Company Automatic system for setting digital watches
US4204398A (en) * 1977-09-16 1980-05-27 Lemelson Jerome H Method and means for automatically setting timepieces in a time zone
US4282595A (en) * 1979-12-21 1981-08-04 Timex Corporation Method for digital frequency trimming an oscillator in an electronic timepiece
US4290130A (en) * 1979-12-21 1981-09-15 Timex Corporation Digital frequency trimmed electronic timepiece
US4407589A (en) * 1981-02-13 1983-10-04 Davidson John R Error correction method and apparatus for electronic timepieces
US4400093A (en) * 1981-07-06 1983-08-23 Omega Louis Brandt & Frere S.A. Method for inspecting the running of a timepiece and timepiece adapted for such method
DE60035650T2 (de) * 1999-03-30 2008-05-21 Seiko Epson Corp. Elektronisches uhrwerk und verfahren zur datenuebertragung fuer elektronisches uhrwerk
WO2000058794A1 (fr) * 1999-03-30 2000-10-05 Seiko Epson Corporation Dispositif electronique, dispositif de reglage externe de dispositif electronique et procede de reglage de dispositif electronique
JP2004226165A (ja) 2003-01-21 2004-08-12 Denso Corp 車両用電子制御装置及び車両乗員検知装置
JP2010256240A (ja) * 2009-04-27 2010-11-11 Denso Corp 車両用時計および車両用時計の製造方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786972A (en) * 1956-04-27 1957-03-26 Gen Electric Commercial power frequency cordless synchronous clock
CH496277A (fr) * 1967-09-01 1970-05-29 Patek Philippe Sa Dispositif de remise à l'heure automatique permanente d'une horloge
US3541779A (en) * 1968-03-19 1970-11-24 Corning Glass Works Electronic timepiece
US3777471A (en) * 1971-08-27 1973-12-11 Bulova Watch Co Inc Presettable frequency divider for electronic timepiece
JPS5319944B2 (de) * 1971-09-25 1978-06-23
CH554015A (de) * 1971-10-15 1974-09-13
IT957184B (it) * 1972-04-12 1973-10-10 Mischiatti S Apparecchiatura elettronica per il comando e la sincronizzazione locale o universale di orologi
GB1450072A (en) * 1972-10-02 1976-09-22 Citizen Watch Co Ltd Electronic timepiece
JPS49114858A (de) * 1973-02-28 1974-11-01
JPS6120817B2 (de) * 1973-12-24 1986-05-23 Citizen Watch Co Ltd
US3914931A (en) * 1974-10-01 1975-10-28 Suwa Seikosha Kk Electronic timepiece

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315332A (en) * 1979-04-13 1982-02-09 Kabushiki Kaisha Daini Seikosha Electronic timepiece radio
US4580282A (en) * 1981-11-25 1986-04-01 Plessey Overseas Limited Adjustable ratio divider
EP0253227A1 (de) * 1986-07-10 1988-01-20 EM Microelectronic-Marin SA (EM Microelectronic-Marin AG) (EM Microelectronic-Marin Ltd) Vorrichtung zum Programmieren einer nichtflüchtigen Speichervorrichtung für ein Uhrwerk
CH664868GA3 (de) * 1986-07-10 1988-04-15
EP0635771A1 (de) * 1993-01-08 1995-01-25 Citizen Watch Co. Ltd. Datenübertragungsempfangsystem für elektronische Uhr
EP0635771A4 (de) * 1993-01-08 1995-06-07 Citizen Watch Co Ltd Datenübertragungsempfangsystem für elektronische Uhr.
US6522601B2 (en) 1993-01-08 2003-02-18 Citizen Watch Co., Ltd. Data transmission/reception system for electronic timepieces
US6754138B2 (en) 1993-01-08 2004-06-22 Citizen Watch Co., Ltd. Data transmission/reception system for electronic timepieces

Also Published As

Publication number Publication date
MY8100133A (en) 1981-12-31
HK34980A (en) 1980-07-01
US4051663A (en) 1977-10-04
JPS587190B2 (ja) 1983-02-08
JPS5087366A (de) 1975-07-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19941203